Gilmour Polymer Impulse Lawn Sprinkler Patented impulse arm saves water by eliminating back and side splash Control the distance of the spray with an easy top knob and set a lever to control how full a circle the water will cover Diffuser screw allows for a heavy stream or a fine spray of water Spike base lets you choose how high off the ground you want the sprinkler head, and also holds it firmly in the ground Water all or part of an 86 foot circle, water coverage up to 5800 square feet